The Duplicating Ray is a machine created by S.T.A.R. Labs. It appeared in The Streaky Story.
It could duplicate anyone or anything it shot at. The Junkyard Dogs chased Streaky to S.T.A.R. Labs and he fell through the window landing on the machine. He accidently turned it on and the ray duplicated everything in the laboratory. The ray shot at Krypto, but it bounced off his super coat and hit Streaky. It turned out instead of copying Krypto, the ray copied his powers creating Streaky the Supercat.